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Idle seems to skip or get weak while stopped

Tiny
MP7804
  • MEMBER
  • 2006 BMW 330
  • 60,000 MILES
My 2006 BMW 330xi's idle seems to 'skip' (or get weak) while waiting/stopped at a stop light (doesn't cut off.) It only happens intermittently. More so once the car has been driven for a couple hours in the same day. It never happens first thing in the morning, but more frequent at night. No indicators on the dash, so BMW can never 'find' the issue. (Approx. 60,000 mi) The car drives fine at high speeds, no concern there. What could be the problem?

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Monday, January 30th, 2012 AT 11:07 PM

3 Replies

Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Have them check for vacuum leaks and scan for both hard and soft codes. Also, see if you can have live data polled and printed.
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Tuesday, January 31st, 2012 AT 1:02 AM
Tiny
MP7804
  • MEMBER
  • 6 POSTS
Thanks for your response can you please elaborate on what you mean by 'scanning for both hard & soft codes'? Usually they just say nothing is coming up on the computer.
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Tuesday, January 31st, 2012 AT 1:49 AM
Tiny
RIVERMIKERAT
  • MECHANIC
  • 6,110 POSTS
Hard codes cause the CEL to come one or flash. Soft codes don't.
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Tuesday, January 31st, 2012 AT 3:25 AM

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